AIPMT MAINS2012Physics-Electrostatics
AIPMT MAINS 2012 Physics Capacitance MCQ Question
Type: MCQ-numerical-Medium-Class 12
A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the plates is d and area of each plate is A, the energy stored in the capacitor is:
A
½ ε₀E²
B
E² Ad/ε₀
C
½ ε₀E² Ad
D
ε₀EAd
Correct Answer
Option C
Detailed Explanation
The energy stored in the capacitor is given by U = ½ CV². Using V = E.d and C = Aε₀/d, we find U = ½ (Aε₀/d) (Ed)² = ½ ε₀E² Ad.
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